simple machines n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Simple Machines PowerPoint Presentation
Download Presentation
Simple Machines

Loading in 2 Seconds...

play fullscreen
1 / 61

Simple Machines - PowerPoint PPT Presentation


  • 102 Views
  • Uploaded on

Simple Machines. What are the 6 simple machines?. Inclined plane Wedge Screw. Lever Wheel & Axle Pulley. MACHINE. Def : A device that allows you to do work in a way that is easier.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Simple Machines' - pembroke


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
what are the 6 simple machines
What are the 6 simple machines?
  • Inclined plane
  • Wedge
  • Screw
  • Lever
  • Wheel & Axle
  • Pulley
machine
MACHINE
  • Def: A device that allows you to do work in a way that is easier.
  • Sent.: They have agreed to rely primarily on the use of the six simple machines to accomplish their mission.
machine1
MACHINE
  • Sp: máquina
  • Discuss in your group different machines.
how does a machine make work easier
HOW DOES A MACHINE MAKE WORK EASIER?
  • Change the amount of force you exert
  • Change the distance over which you exert your force.
  • Change the direction in which you exert your force.
input force
INPUT FORCE
  • Def.: The force exerted on a machine
  • Sent.: Machines such as the car jack, the ramp, the crow bar, and the claw hammer make work easier by making the output force greater than the input force.
  • Sp.: fuerzaaplicada
output force
OUTPUT FORCE
  • Def.: The force exerted on an object by a machine.
  • Sent.: Machines such as the car jack, the ramp, the crow bar, and the claw hammer make work easier by making the output force greater than the input force.
  • Sp.: fuerzadesarrollada
input work
INPUT WORK
  • Def.: The work done on a machine as the input force acts through the input distance.
  • Sent.: For such an ideal machine, the input work would equal the output work.
  • Sp.: trabajoaportado
output work
OUTPUT WORK
  • Def.: The work done by a machine as the output force acts through the output distance.
  • Sent.: For such an ideal machine, the input work would equal the output work.
  • Sp.: trabajoproducido
mechanical advantage
MECHANICAL ADVANTAGE
  • Def.: Number of times a machine increases a force exerted on it.
  • Sent.: The mechanical advantage of a machine without friction is called the ideal mechanical advantage, or IMA.
  • Sp.: ventaja mecánica
inclined plane1
Inclined Plane
  • Def.: Flat, sloped surface
  • Sent.: An inclined plane allows you to exert your input force over a longer distance.
  • Sp.:planoinclinado
  • Discuss with your table different types of ramps.
inclined plane2
Inclined Plane
  • How it works: increases the distance the input force has to go.
  • IMA = length of incline ÷ height of incline
direct relationship
Direct Relationship
  • Def.: When both variable either increase or decrease
  • Sent.: Is the relationship direct or indirect?
  • Sp.:relación directa
indirect relationship
Indirect Relationship
  • Def.: When one variable increases, the other decreases
  • Sent.: Is the relationship direct or indirect?
  • Sp.:relación indirecta
taper
Taper
  • Def.: to become smaller or thinner toward one end. .
  • Sent.: A wedge is a device that is thick on one end and tapers to a thin edge on the other end
  • Sp.:disminución gradua
  • What are different things that taper?
wedge1
Wedge
  • Def.: a device that is thick on one end and tapers to a thin edge on the other end.
  • Sent.: That force pushes the wedge down into the wood.
  • Sp.: cuña
  • With your table make a list of at least 5 different wedges. Raise your hand when you have your list.
wedge2
Wedge
  • Two inclined planes back to back
  • How it works: The wedge moves exerting an output force at a 90° angle
  • IMA = length of wedge ÷ width of wedge
thread
Thread
  • Def.: a helical groove in a cylindrical hole ( female thread ), formed by a tap or lathe tool, or a helical ridge on a cylindrical bar, rod, shank, etc ( male thread ), formed by a die or lathe tool
  • Kid def.: A twisting raised area around a cylinder or inside a round hole.
thread1
Thread
  • Sent.: Record the effort force, the distance lifted and the thread density for 5 tests
  • Sp.:tema
  • Discussion: Is a screw with threads closer together have a higher or lower thread density?
screw1
Screw
  • Def.: An inclined plane wrapped around a cylinder creating spirals called threads.
  • Sent.: Like a wedge, a screw is a simple machine that is related to the inclined plane.
  • Sp.:tornillo
  • Discussion: Are there different types of screws? If so, what are they?
screw2
Screw
  • How it works: Threads increase the distance over which you exert input force.
  • The output force pulls the screw into the material. Friction holds it in place.
  • IMA = length around the threads ÷ length of screw
lever
Lever
  • Def: A rigid bar that is free to pivot (rotate.)
  • Kid Def.: A stiff bar that can rotate freely
  • Sent.: What are the advantages of using a lever to lift this stone?
  • Sp.: palanca
  • Disc.: What levers do you use every day?
fulcrum
Fulcrum
  • Def.: The fixed point that a lever pivots around.
  • Sent.: Predict fulcrum placements which will not be successful.
  • Sp.: fulcro
  • Disc.: What types of things can be a fulcrum?
1st class lever
1st Class Lever
  • How it works: Changes direction of input force
    • If fulcrum is closer to output force, also increases force.
    • If fulcrum is closer to input force, also increases distance.
  • Calculating IMA:
1st class lever1
1st Class Lever
  • Ex. paint can opener, scissors
2nd class lever
2nd Class Lever
  • How it works: Increases force but doesn’t change direction.
  • Calculating IMA:
2nd class lever1
2nd Class Lever
  • Ex.: Wheel barrow, doors, nutcrackers
3rd class lever
3rd Class Lever
  • How it works: Increases distance but doesn’t change direction.
  • Calculating IMA:
3rd class lever1
3rd Class Lever
  • Ex. Hockey stick, shovel, fishing pole
radius
Radius
  • Def.: astraight line extending from the center of a circle or sphere to the circumferenceor surface
  • Sent.: As the radius of the wheel increases, what happens to its circumference?
  • Sp.: radio
regulate
Regulate
  • Def.:  To control or direct according to rule, principle, or law.
  • Sent.: The crew's final task at this location is to construct a device to regulate the flow of water through the irrigation canals.
  • Sp.: ajustar
wheel axle1
Wheel & Axle
  • Def.: Made of 2 circular/cylindrical objects fastened together that rotate around a common axis.
  • Object with larger radius is wheel, and smaller radius is axle.
wheel axle2
Wheel & Axle
  • How it works: Increases your force by going a longer distance.
  • Calculating IMA: IMA = radius of wheel ÷ radius of axle
  • Ex.: door knob, car wheel & axle, steering wheel, windmill, water wheel
pulleys1
Pulleys
  • Def.: A grooved wheel with a rope or cable wrapped around it.
  • Sent.: As the number of supporting ropes on the pulley increases, what happens to the length of rope that must be pulled to lift the stone into place?
  • Sp.: polea
  • Disc.: What pulleys have you seen?
pulleys2
Pulleys
  • How it works: Pulling on rope (input force )causes an object to move up.
  • It can decrease the amount of input force needed and it can change direction of input force.
  • IMA = number of sections of rope that support object
types of pulleys
Types of Pulleys
  • Fixed –
    • How it works: changes direction of the force
    • Def.: Pulley is attached to an object
    • IMA = 1
types of pulleys1
Types of Pulleys
  • Movable –
    • How it works: decreases amount of input force needed, doesn’t change direction
    • Pulley isn’t attached
    • IMA = 2
types of pulleys2
Types of Pulleys
  • Block and Tackle –
    • Def.: made of fixed and moveable pulleys
    • How it works: Decreases amount of input force needed
    • IMA = 3
compound machines
Compound Machines
  • Def.: A machine that utilizes two or more simple machines.
  • IMA = product of the individual IMA of each simple machine that makes up compound machine.
simple machines in the body
Simple Machines in the Body
  • At joints are levers - muscles are input force, and output force does the work
  • Teeth are wedges